May be another month. She is the best one that I had left. If you feed her frozen blood worm (that is what I use to condition my breeding pair), I think 1 month she will be ready.
If you do, try to use smaller male (too big male is hard for her); she is kind of small. She is 4 months; every site I visit says 4 month is ok. But I think at least 5 months is much better. In Vietnam, I bred them around 8-9 months.
Batta Talk expert really recommend young betta. Combine new information and my old information, I think 5 month old female is good. But I think she needs to have good blood worms. I got a package with 32 cubes for $5 or so; I cut cube into 1/2 so I have 64 that can be used for 40 days or more.
You now have MW and BBS eggs to practice making fry food. I do not use use light for BBS egg hatching. Room temperature is good but it takes longer to hatch.
Again the female needs another month with good food.